Budget preamp recommendation...besides Schiit.

Rogue RP1 is very good. Build quality, sound, responds extremely well to tube rolling and cable changes. As an added bonus, it sports a very good Phono stage. 

Dont hate on it but Emotiva XSP-1 Gen 2, excellent fully differential balanced 2 channel pre-amp, read the reviews, if you can find one, it seriously replaced my Krell KAV 250p, and no it is not a home theatre preamp, the soundstage actually blew me and a couple of listening buddies away, we went into it thinking how everyone else thinks about Emotiva equipment, but the proof was in the puddin as they say✌️🎶, excellent mc/mm phono stage also.

Townshend Allegri+
I got one new directly from Townshend for cheaper than advertised. 
 

I concur with all the reviews already written about this preamp. 
 

https://the-ear.net/review-hardware/townshend-allegri-passive-preamplifier/
 

https://www.theaudiophileworld.net/2018/05/the-townshend-allegri-real-world-review.html?m=1
 

https://www.hifipig.com/townshend-allegri-passive-preamplifier/

Nelson Pass Nutube Korg B1.

Such a lot on offer for such a little outlay.

Khozmo passives or Hattor passive/active, both made with high quality attenuators and parts plus huge selection of options between the two "sister" companies (i.e., same owner/manufacturer - Hattor is to Khozmo what Lincoln is to Ford).